MILITARY STANDARD SAMPLING PROCEDURESAND TABLES …

1 MI14TD-105O. 29 April 1963. SUPERSEDING. MIL-STD-105C. 18 July 1961. MILITARY STANDARD . SAMPLING PROCEDURESAND TABLES . FOR INSPECTION BY ATTRIBUTES. Source: -- Downloaded: 2008-06-18T06:23Z. Check the source to verify that this is the current version before use. MIW3TD-105D. 2$1 APRIL 1963. OF DEFENSE. DEPART?fEtJT. Washington 25, D. C. SAMPLING . PROCEDURES. ANDTABLESFI)RINSP~TION M ATTRIMJTES. Mu Fsrblojv 29 APRIL 1963. 1. This STANDARD has been approved ~ the Department Of Defense and is mandatory f~ r use by the Departments Of the ~, the Navy, the Air Force and the Defense Supply &ency. This revision supersedes MIL-STB105C, dated 18 July 1961.

2 2. l'his publication provides SSMpM~ proc~ure~ ad reference TABLES for use ,in planning and conduct- inspection by attributes. This publication was developed by a working group representing the mi~t~ *. SeMCeS of C&~ada, the United Kingdom and the united States of America with the assi stance and cooperation of ~ericw Ud European organizations ,). for q~tity conLrol. The international designation of this document is ALX-STD-105. When revision or cancellation of this STANDARD is proposed, the departmental custotims uiu infG~ their respective Standardization Office so that appropriate action m~ be taken respecting the international agreement concerned.

3 3. The Amy Munitions co~d is designated as preparing activity for this Recommended corrections, additions, or deletions should be addressed to the Officer, U. S. * CRRK ngineer@g Office, Attn: 9411C&E&S, Armjj Chemical Center, Mary]md. Source: -- Downloaded: 2008-06-18T06:23Z. Check the source to verify that this is the current version before use. CONTENTS. Paragraph Page . 1, SCOPE .. 1. { 2. CLASSIFICATION OF DEFECTS AND DEFECTIVES . 2. 3. PERCENT DEFECTIVE AND DEFECTS PER HUNDRED UNITS 2. 4, ACCEPTABLE QUALITY LEVEL (AQL) .. 3. 5. SUBMISSION OF PRODUCT .. 3. 6. ACCE~ANCE AND R~ECTION .. 4. 7. DRAWING OF SAMPLES .. 4. 8.}

4 NORMAL, TIGHTENED, AND REDUCED INSPECTION .. 5. 9. SAMPLING PLANS .. 6. 10. DETERMINATION OF ACCEPTABILITY .. 7. 11. SUPPLEMENTARY INFORMATION .. 7. TABLES . Table I Sample Size Code Letters .. 9. Table II-A Single SAMPLING Plans for Normal Inspection (Master Table) .. 10. Table II-B Single SAMPLING Plans for Tightend Insp~tion (Master Table) .. 11. Table II-C Single SAMPLING Plans for Reduced Inspection (Master Table) .. 12. Table III-A Double SAMPLING Plans for Normal Inspection (Master Table) .. 13. Table HI-B Double SAMPLING Plans for Tightened Inspection (Master Table) 14. Table III-C Double SAMPLING Plans for Reduced Inspection (Master Table).

5 15. Table IV-A Multiple SAMPLING Plans for Normal Inspection (Master Table) .. 16. Table IV-B Multiple SAMPLING Plans for Tightened Inspection \ (Master Table) .. 18. Table IV-C Multiple SAMPLING Plans for Reduced Inspection (Master Table) . 20. Table V-A Average Outgoing Quality Limit Factors for Normal Inspection (Single SAMPLING ) .. 22. Table V-B Average Outgoing Quality Limit Factor for Tightened Inspection (Single SAMPLING ) .. 23. Table VI-A Limiting Quality (in percent defective ) for which the Pa = 10~. (for Normal Inspection, Single SAMPLING ) .. 24. Table VI-B Limiting Quality (in defects per hundred units) for which the Pa = 10Y, (for Normal Inspection, Single SAMPLING ).

6 25. Table VII-A Limiting Quality (in percent defective) for which the Pa = 5~C. (for Normal Inspection, Single SAMPLING ) .. 26. Table VII-B Limiting Quality (in defects per hundred units) for which Pa = 574 (for Normal Inspection, Single SAMPLING ) .. 27. Table VIII Limit Numbers for Reduced Inspection .. 28. Table IX Average Sample Size Curves for Double and Multiple SAMPLING .. 29. SAMPLING Plans and Operating Characteristic Curves (and Data) for: Table X-A Sample Size Code Letter A .. 30. Table X-B Sample Size Code Letter B .. 32. Table X-C Sample Size Code Letter C .. 34. iii Source: -- Downloaded: 2008-06-18T06:23Z.

7 Check the source to verify that this is the current version before use. Table X-D Sample Size Code Letter D .. 36. Table X-E Sample Size Code- Letter E .. 38 ). Table X-F Sample Size Code Letter F .. 40. Table X-G Sample Size Code Letter G .. 42. Table X-H Sample Size Code Letter H .. 44. Table X-J Sample Size Code Letter J .. 46. Table X-K Sample Size Code ktter K .. 48. Table X-L Sample Size Code Letter L .. 50. Table X-M Sample Size Code Letter M .. 52. Table X N Sample Size Code Letter N .. 54. Table X-P Sample Size Code Letter P .. 56. Table X-Q Sample Size Code Letter Q .. 58. Table X-R Sample Size Code Letter R.

8 60. Table X-S Sample Size Code Letter S .. 62. INDEX OF TERMS WITH SPECIAL MEANINGS .. 63. -- ). Source: -- Downloaded: 2008-06-18T06:23Z. Check the source to verify that this is the current version before use. SAMPLING PROCEDURES AND TABLES . FOR INSPECTION BY ATTRIBUTES. 1. SCOPE - 1. I PURPOSE. T'nis publication estab- The plans may also be used for the inspection lishes SAMPLING plans and procedures for of isolated lots .or batches, but, in this latter inspection by attributes. When specified by case, the user is cautioned to consult the the responsible authority, this publication operating characteristic curves to find a plan shall be referenced in the specification, con- which will yield the desired protection (see tract, inspection instructions, or other docu- ).

9 Ments and the provisions set forth herein shall govern. The responsible authority INSPECTION. Inspection is the proc- shall be designated in one of the above ess of measuring, examining, testing, or documents. otherwise comparing the unit of product (see ) with the requirements. APPLICATION. SAMPLING plans des- ignated in this publication are applicable, but INSPECTION BY ATTRIBUTES. In- not limited, to inspection of the following: spection by attributes is ,inspection whereby either the unit of product is classified simply a. End items. as defective or nondefective, or the number b. Components and raw materials. of defects in the unit of product is counted, with respect to a given requirement or set c.

10 Operations. of requirements. d, Materials in process. UNIT OF PRODUCT. The unit of e. Supplies in storage. product is the thing inspected in order to determine its classification as defective or f. Maintenance operations. nondefective or to count the number of de- fects. It may be a single article, a pair, a set, g. Data or records. a length, an area, an operation, a volume, a component of an end product, or the end h. Administrative procedures. product itself. The unit of product may or These plans are intended primarily to be may not be the same as the unit of purchase. used for a continuing series of lots or batches. supply, production, or shipment.